Solar Hours Calculator
Solar Hours is evaluated from US Region / City and Solar System Size. The calculation reports Peak Sun Hours per Day, Daily Solar Production and Annual Solar Production.
Results
About the Solar Hours Calculator
The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.
Formula basis:
Daily production = System kW x Peak Sun Hours x 0.80 (efficiency)
Annual = Daily x 365
Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.
Formula & How It Works
The calculation applies the following relations exactly as recorded in the metadata: Daily production = System kW x Peak Sun Hours x 0.80 (efficiency) Annual = Daily x 365 Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.
Worked Examples
Example 1: 6 kW system in Phoenix (7.0 PSH)
Inputs
With US Region / City = 7 and Solar System Size = 6 as the stated inputs, the result is Peak Sun Hours per Day = 7 hrs/day, Daily Solar Production = 33.6 kWh/day and Annual Solar Production = 12,264 kWh/yr. Each value corresponds to the declared output fields.
Example 2: 6 kW system in Seattle (3.5 PSH)
Inputs
With US Region / City = 3.5 and Solar System Size = 6 as the stated inputs, the result is Peak Sun Hours per Day = 3.5 hrs/day, Daily Solar Production = 16.8 kWh/day and Annual Solar Production = 6,132 kWh/yr. Each value corresponds to the declared output fields.
Example 3: 8 kW system in Dallas (5.5 PSH)
Inputs
With US Region / City = 5.5 and Solar System Size = 8 as the stated inputs, the result is Peak Sun Hours per Day = 5.5 hrs/day, Daily Solar Production = 35.2 kWh/day and Annual Solar Production = 12,848 kWh/yr. Each value corresponds to the declared output fields.
Example 4: 10 kW system in Miami (5.3 PSH)
Inputs
With US Region / City = 5.3 and Solar System Size = 10 as the stated inputs, the result is Peak Sun Hours per Day = 5.3 hrs/day, Daily Solar Production = 42.4 kWh/day and Annual Solar Production = 15,476 kWh/yr. Each value corresponds to the declared output fields.
Common Use Cases
- Find peak sun hours for a US location
- Calculate how sun hours affect solar production
- Compare solar productivity across US cities